She was found submerged in the bath (chìm trong bồn tắm) of her Los Angeles hotel room on the eve of the Grammy Awards on 11 February.

In a statement, the LA County Coroner’s office described Houston’s manner of death as an “accident”, adding that “no trauma (thương tích ) or foul play (mưu hại) is suspected”.

The cause was cited as drowning and “effects of atherosclerotic (xơ cứng động mạch) heart disease and cocaine use”.

Other drugs found in her blood included marijuana (cần sa), as well as an anti-anxiety (an thần) drug, a muscle relaxant and an allergy medication (thuốc chống dị ứng).

But these were not factors in her death, the coroner’s statement said.

Patricia Houston, the singer’s sister-in-law and manager, told the Associated Press news agency: “We are saddened to learn of the toxicology results, although we are glad to now have closure (đóng lại vụ án; kết thúc điều tra).”

The pop star (ngôi sao nhạc pop) was laid to rest at a cemetery in her home state of New Jersey after a funeral that was attended by celebrities (các nhân vật nổi tiếng) including Oprah Winfrey, Alicia Keys, Mariah Carey and Mary J Blige.

The singer, who was one of the world’s best selling artists from the mid-1980s to late 1990s, had a long battle with drug addiction (nghiện ma túy).